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yang huai de gen xi yu shan di tu rang
Author(s): 
Pages: 36-37
Year: Issue:  5
Journal: Beijing Agricultural Sciences

Keyword:  荒山绿化洋槐山地土壤根系垂直根水平根实践证明水土保持林花岗岩风化物水土流失;
Abstract: <正> 华北的荒山绿化多强调“三松二柏”,但多年的实践证明,几十年方能见效益的松柏,并没有把荒山绿化起来,没有制止住水土流失,也没有使山区人民得到明显的经济效益。而不甚被人重视的洋槐,在近年的荒山绿化中却发挥了很大的作用。根据密云县高岭乡四合村的经验,洋槐林既是水土保持林、薪炭林、用材林,又是饲料林(有人称之为“空中牧场”),它可以解放农村中一定程度的燃料、饲料和肥料的矛盾问题,可以改良土壤、提高地力,促进农林业增产。
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